Jump to content

Switch vs. Select

Tumulus

By Tumulus,
in Developer General Discussion

 Share

Recommended Posts

BrewManNH Universalist

BrewManNH

Posted
Posted

Switch is comparing against one expression, and then using the Cases to determine which one matches it. Select is more like a compact form of If/Then and each case can be a totally unrelated test parameter to any other comparison being done. 

; Switch example
$a = 5
$x = 3
$b = "Dog"
Switch $a
    Case 5
         ;"do this"
    
    Case 4
        ; "do something else"
    Case Else
        ; "nothing matched so do this"
EndSwitch
Select
    Case $a = 4
        ; "do this"
    Case $x = 2
        ; Do this instead
    Case $b = "Dog"
        ; Do something totally unrelated
    Case Else
        ; Do Nothing
EndSelect

 

If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag Gude
How to ask questions the smart way!

I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript.com forums, unless I've specifically stated otherwise in the code or the thread post. If you do use my code all I ask, as a courtesy, is to make note of where you got it from.

Back up and restore Windows user files _Array.au3 - Modified array functions that include support for 2D arrays.  -  ColorChooser - An add-on for SciTE that pops up a color dialog so you can select and paste a color code into a script.  -  Customizable Splashscreen GUI w/Progress Bar - Create a custom "splash screen" GUI with a progress bar and custom label.  -  _FileGetProperty - Retrieve the properties of a file  -  SciTE Toolbar - A toolbar demo for use with the SciTE editor  -  GUIRegisterMsg demo - Demo script to show how to use the Windows messages to interact with controls and your GUI.  -   Latin Square password generator

Link to comment
Share on other sites
spudw2k Universalist

spudw2k

Posted
Posted

No new info here, but I tend to think of it this way.

A switch statement acts...like a switch....doy....  Think of a multiple state toggle switch; a pickup selector switch on a guitar makes for a decent example.  When the switch is moved, it is evaluated based on the discrete value/condition and outputs as designed/programmed.  

A select statement could be seen as the whole guitar.  If I turn the volume nob, adjust volume output...if I adjust a tuning peg, tighten or loosen string...if I plug in guitar...you get the idea.

Spoiler

Things I've Made: Always On Top Tool ◊ AU History ◊ Deck of Cards ◊ HideIt ◊ ICU ◊ Icon Freezer ◊ Ipod Ejector ◊ Junos Configuration Explorer ◊ Link Downloader ◊ MD5 Folder Enumerator ◊ PassGen ◊ Ping Tool ◊ Quick NIC ◊ Read OCR ◊ RemoteIT ◊ SchTasksGui ◊ SpyCam ◊ System Scan Report Tool ◊ System UpTime ◊ Transparency Machine ◊ VMWare ESX Builder
Misc Code Snippets: ADODB Example ◊ CheckHover ◊ Detect SafeMode ◊ DynEnumArray ◊ GetNetStatData ◊ HashArray ◊ IsBetweenDates ◊ Local Admins ◊ Make Choice ◊ Recursive File List ◊ Remove Sizebox Style ◊ Retrieve PNPDeviceID ◊ Retrieve SysListView32 Contents ◊ Set IE Homepage ◊ Tickle Expired Password ◊ Transpose Array
Projects: Drive Space Usage GUI ◊ LEDkIT ◊ Plasma_kIt ◊ Scan Engine Builder ◊ SpeeDBurner ◊ SubnetCalc
Cool Stuff: AutoItObject UDF ◊ Extract Icon From Proc ◊ GuiCtrlFontRotate ◊ Hex Edit Funcs ◊ Run binary ◊ Service_UDF

 

Link to comment
Share on other sites
czardas Universalist

czardas

Posted
Posted

Cool analogy, but I think of Switch as a whole guitar and Select as a whole guitar shop. 

Local $vGuitar = 'more expensive model', $vDuffer = 'cheap guitar', $iDollars = Random(100, 140, 1)

Switch $vGuitar
    Case 'more expensive model'
        ; get a good quality guitar case
    Case Else
        Select
            Case $vDuffer = 'cheap guitar' And $iDollars <= 120
                ; check out the more expensive model
            Case Else
                ; pay in installments
        EndSelect
EndSwitch

 

operator64  ArrayWorkshop

Link to comment
Share on other sites
spudw2k Universalist

spudw2k

Posted
Posted
4 minutes ago, czardas said:

Cool analogy, but I think of Switch as a whole guitar and Select as a whole guitar shop.

Micro vs macro I guess. :)

Spoiler

Things I've Made: Always On Top Tool ◊ AU History ◊ Deck of Cards ◊ HideIt ◊ ICU ◊ Icon Freezer ◊ Ipod Ejector ◊ Junos Configuration Explorer ◊ Link Downloader ◊ MD5 Folder Enumerator ◊ PassGen ◊ Ping Tool ◊ Quick NIC ◊ Read OCR ◊ RemoteIT ◊ SchTasksGui ◊ SpyCam ◊ System Scan Report Tool ◊ System UpTime ◊ Transparency Machine ◊ VMWare ESX Builder
Misc Code Snippets: ADODB Example ◊ CheckHover ◊ Detect SafeMode ◊ DynEnumArray ◊ GetNetStatData ◊ HashArray ◊ IsBetweenDates ◊ Local Admins ◊ Make Choice ◊ Recursive File List ◊ Remove Sizebox Style ◊ Retrieve PNPDeviceID ◊ Retrieve SysListView32 Contents ◊ Set IE Homepage ◊ Tickle Expired Password ◊ Transpose Array
Projects: Drive Space Usage GUI ◊ LEDkIT ◊ Plasma_kIt ◊ Scan Engine Builder ◊ SpeeDBurner ◊ SubnetCalc
Cool Stuff: AutoItObject UDF ◊ Extract Icon From Proc ◊ GuiCtrlFontRotate ◊ Hex Edit Funcs ◊ Run binary ◊ Service_UDF

 

Link to comment
Share on other sites
Tumulus Seeker

Tumulus

Posted
  • Author
Posted (edited)

Thanks! Those are really helpful concepts. So as far as I understand, going with my own little analogy, a select could include a bunch of different spacecraft and according to some criteria choose between them. Then with switch, you could determine different travel times based on the different warp drives for each one. Basically that a select deals with different parameters (rebel, empire, purpose) and switch is used for a single expression (millenium falcon) 

Local $vXWing = ;type of drive
Local $vMilleniumFalcon = ;type of drive
Local $vTieFighter = ;type of drive

Local $vMyShip
Local $vRebel = 'no'
Local $vEmpire = 'no'
Local $vPurpose = 'smuggling'

Select
    Case $vRebel = 'destroy death star'
        $vMyShip = $vXWing
    Case $vEmpire = 'yes'
        $vMyShip = $vTieFighter
    Case $vPurpose = 'smuggling'
        $vMyShip = $vMilleniumFalcon
        Switch $vMilleniumFalcon
            Case 'standard' ; = type of drive that $millenium falcon is set equal to when declared 
                ;plan for imperial boarding
            Case 'upgraded'
                ;She can outrun an imperial star destroyer
            Case 'Han Solo custom'
                ;kessel run in 12 parsecs
        EndSwitch
End Select

 

Edited by Tumulus
corrected syntax of code.
Link to comment
Share on other sites
spudw2k Universalist

spudw2k

Posted
Posted

czardas is right.  Switch needs an object to evaluate.   

Switch $vMilleniumFalconConfiguration

 

Spoiler

Things I've Made: Always On Top Tool ◊ AU History ◊ Deck of Cards ◊ HideIt ◊ ICU ◊ Icon Freezer ◊ Ipod Ejector ◊ Junos Configuration Explorer ◊ Link Downloader ◊ MD5 Folder Enumerator ◊ PassGen ◊ Ping Tool ◊ Quick NIC ◊ Read OCR ◊ RemoteIT ◊ SchTasksGui ◊ SpyCam ◊ System Scan Report Tool ◊ System UpTime ◊ Transparency Machine ◊ VMWare ESX Builder
Misc Code Snippets: ADODB Example ◊ CheckHover ◊ Detect SafeMode ◊ DynEnumArray ◊ GetNetStatData ◊ HashArray ◊ IsBetweenDates ◊ Local Admins ◊ Make Choice ◊ Recursive File List ◊ Remove Sizebox Style ◊ Retrieve PNPDeviceID ◊ Retrieve SysListView32 Contents ◊ Set IE Homepage ◊ Tickle Expired Password ◊ Transpose Array
Projects: Drive Space Usage GUI ◊ LEDkIT ◊ Plasma_kIt ◊ Scan Engine Builder ◊ SpeeDBurner ◊ SubnetCalc
Cool Stuff: AutoItObject UDF ◊ Extract Icon From Proc ◊ GuiCtrlFontRotate ◊ Hex Edit Funcs ◊ Run binary ◊ Service_UDF

 

Link to comment
Share on other sites
guinness Universalist

guinness

Posted
Posted

Select is sugar for if...else if...else

UDF List:

 
_AdapterConnections() • _AlwaysRun() • _AppMon() • _AppMonEx() • _ArrayFilter/_ArrayReduce • _BinaryBin() • _CheckMsgBox() • _CmdLineRaw() • _ContextMenu() • _ConvertLHWebColor()/_ConvertSHWebColor() • _DesktopDimensions() • _DisplayPassword() • _DotNet_Load()/_DotNet_Unload() • _Fibonacci() • _FileCompare() • _FileCompareContents() • _FileNameByHandle() • _FilePrefix/SRE() • _FindInFile() • _GetBackgroundColor()/_SetBackgroundColor() • _GetConrolID() • _GetCtrlClass() • _GetDirectoryFormat() • _GetDriveMediaType() • _GetFilename()/_GetFilenameExt() • _GetHardwareID() • _GetIP() • _GetIP_Country() • _GetOSLanguage() • _GetSavedSource() • _GetStringSize() • _GetSystemPaths() • _GetURLImage() • _GIFImage() • _GoogleWeather() • _GUICtrlCreateGroup() • _GUICtrlListBox_CreateArray() • _GUICtrlListView_CreateArray() • _GUICtrlListView_SaveCSV() • _GUICtrlListView_SaveHTML() • _GUICtrlListView_SaveTxt() • _GUICtrlListView_SaveXML() • _GUICtrlMenu_Recent() • _GUICtrlMenu_SetItemImage() • _GUICtrlTreeView_CreateArray() • _GUIDisable() • _GUIImageList_SetIconFromHandle() • _GUIRegisterMsg() • _GUISetIcon() • _Icon_Clear()/_Icon_Set() • _IdleTime() • _InetGet() • _InetGetGUI() • _InetGetProgress() • _IPDetails() • _IsFileOlder() • _IsGUID() • _IsHex() • _IsPalindrome() • _IsRegKey() • _IsStringRegExp() • _IsSystemDrive() • _IsUPX() • _IsValidType() • _IsWebColor() • _Language() • _Log() • _MicrosoftInternetConnectivity() • _MSDNDataType() • _PathFull/GetRelative/Split() • _PathSplitEx() • _PrintFromArray() • _ProgressSetMarquee() • _ReDim() • _RockPaperScissors()/_RockPaperScissorsLizardSpock() • _ScrollingCredits • _SelfDelete() • _SelfRename() • _SelfUpdate() • _SendTo() • _ShellAll() • _ShellFile() • _ShellFolder() • _SingletonHWID() • _SingletonPID() • _Startup() • _StringCompact() • _StringIsValid() • _StringRegExpMetaCharacters() • _StringReplaceWholeWord() • _StringStripChars() • _Temperature() • _TrialPeriod() • _UKToUSDate()/_USToUKDate() • _WinAPI_Create_CTL_CODE() • _WinAPI_CreateGUID() • _WMIDateStringToDate()/_DateToWMIDateString() • Au3 script parsing • AutoIt Search • AutoIt3 Portable • AutoIt3WrapperToPragma • AutoItWinGetTitle()/AutoItWinSetTitle() • Coding • DirToHTML5 • FileInstallr • FileReadLastChars() • GeoIP database • GUI - Only Close Button • GUI Examples • GUICtrlDeleteImage() • GUICtrlGetBkColor() • GUICtrlGetStyle() • GUIEvents • GUIGetBkColor() • Int_Parse() & Int_TryParse() • IsISBN() • LockFile() • Mapping CtrlIDs • OOP in AutoIt • ParseHeadersToSciTE() • PasswordValid • PasteBin • Posts Per Day • PreExpand • Protect Globals • Queue() • Resource Update • ResourcesEx • SciTE Jump • Settings INI • SHELLHOOK • Shunting-Yard • Signature Creator • Stack() • Stopwatch() • StringAddLF()/StringStripLF() • StringEOLToCRLF() • VSCROLL • WM_COPYDATA • More Examples...

Updated: 22/04/2018

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...